kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace rc4_keysetup(ffff80002e51330a,ffff80002e51341c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e5132d0,ffffd7aa,205,ffff800000c7766c,ffffd7aa) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e54b3d8,ffff800000c77400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e54b3d8,ffff800000c77400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000c77400,1,ffff800021315cf0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1316 [inline] pppacioctl(4086334,82907003,ffff800000c77400,1,ffff800021315cf0) at pppacioctl+0x156 sys/net/if_pppx.c:1166 VOP_IOCTL(fffffd807af617e8,82907003,ffff800000c77400,1,fffffd807f7d7410,ffff800021315cf0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8077b97568,82907003,ffff800000c77400,ffff800021315cf0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021315cf0,ffff80002e54b728,ffff80002e54b770) at sys_ioctl+0x4a2 syscall(ffff80002e54b7f0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e54b7f0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fff580c650, count: -9 ddb{1}> show registers rdi 0xffff8000231c1000 rsi 0 rbp 0xffff80002e54b260 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x9924626a64a1039b r11 0x83d0c814ae9cc2a7 r12 0xffff80002e51341c r13 0 r14 0xffff80002e51330a r15 0 rip 0xffffffff82440a2f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e54b200 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> show proc PROC (syz-executor.1) pid=416080 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeea88,0xffff800021314d40 process=0xffff8000ffff31f8 user=0xffff80002e546000, vmspace=0xfffffd80751805e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23381 321721 81414 0 2 0 syz-executor.6 46056 262134 94917 0 7 0 syz-executor.0 46056 519269 94917 0 3 0x4000080 bell syz-executor.0 18382 214877 89251 0 2 0 syz-executor.4 18382 505281 89251 0 3 0x4000080 fsleep syz-executor.4 53652 366149 83678 0 2 0 syz-executor.2 53652 178060 83678 0 3 0x4000080 fsleep syz-executor.2 53652 455172 83678 0 3 0x4000080 fsleep syz-executor.2 76792 138073 93942 0 2 0 syz-executor.1 *76792 416080 93942 0 7 0x4000000 syz-executor.1 81414 99731 88694 0 3 0x82 nanoslp syz-executor.6 58588 305385 0 0 3 0x14200 acct acct 93942 347682 88694 0 3 0x82 nanoslp syz-executor.1 34336 373432 0 0 3 0x14280 nfsidl nfsio 28425 464607 0 0 3 0x14280 nfsidl nfsio 35635 59885 0 0 3 0x14280 nfsidl nfsio 14101 3248 0 0 3 0x14280 nfsidl nfsio 67026 249384 0 0 3 0x14280 nfsidl nfsio 90965 131276 0 0 3 0x14280 nfsidl nfsio 43348 68034 0 0 3 0x14280 nfsidl nfsio 55597 279645 0 0 3 0x14280 nfsidl nfsio 63421 517739 0 0 3 0x14280 nfsidl nfsio 15069 280231 0 0 3 0x14280 nfsidl nfsio 91548 495105 0 0 3 0x14280 nfsidl nfsio 54183 352229 0 0 3 0x14280 nfsidl nfsio 25377 192769 0 0 3 0x14280 nfsidl nfsio 85979 187058 0 0 3 0x14280 nfsidl nfsio 47267 255361 0 0 3 0x14280 nfsidl nfsio 85339 343673 0 0 3 0x14280 nfsidl nfsio 22844 245692 0 0 3 0x14280 nfsidl nfsio 66650 356387 0 0 3 0x14280 nfsidl nfsio 72593 290020 0 0 3 0x14280 nfsidl nfsio 32803 24069 0 0 3 0x14280 nfsidl nfsio 91674 186120 88694 0 3 0x2 biowait syz-executor.3 94917 308248 88694 0 3 0x82 nanoslp syz-executor.0 88451 76679 0 0 3 0x14200 bored sosplice 62039 45071 1 0 3 0x100083 ttyin getty 98561 238687 88694 0 3 0x82 nanoslp syz-executor.7 70034 478731 88694 0 3 0x2 biowait syz-executor.5 89251 319797 88694 0 3 0x82 nanoslp syz-executor.4 83678 427815 88694 0 3 0x82 nanoslp syz-executor.2 88694 42721 58192 0 3 0x82 wait syz-fuzzer 88694 84882 58192 0 3 0x4000082 nanoslp syz-fuzzer 88694 179878 58192 0 3 0x4000082 thrsleep syz-fuzzer 88694 157758 58192 0 3 0x4000082 wait syz-fuzzer 88694 451666 58192 0 3 0x4000082 thrsleep syz-fuzzer 88694 367352 58192 0 3 0x4000082 wait syz-fuzzer 88694 154606 58192 0 3 0x4000082 thrsleep syz-fuzzer 88694 280062 58192 0 3 0x4000082 thrsleep syz-fuzzer 88694 201610 58192 0 3 0x4000082 wait syz-fuzzer 88694 73510 58192 0 3 0x4000082 wait syz-fuzzer 88694 389849 58192 0 3 0x4000082 wait syz-fuzzer 88694 198240 58192 0 3 0x4000082 wait syz-fuzzer 88694 302810 58192 0 3 0x4000082 thrsleep syz-fuzzer 88694 425731 58192 0 3 0x4000082 nanoslp syz-fuzzer 88694 426494 58192 0 3 0x4000082 wait syz-fuzzer 88694 204617 58192 0 3 0x4000082 kqread syz-fuzzer 58192 510724 2503 0 3 0x10008a sigsusp ksh 2503 13814 46790 0 3 0x9a kqread sshd 46790 335962 1 0 3 0x88 kqread sshd 97320 324533 42068 74 3 0x1100092 bpf pflogd 42068 71735 1 0 3 0x80 netio pflogd 23463 441810 62892 73 3 0x1100090 kqread syslogd 62892 22841 1 0 3 0x100082 netio syslogd 47371 222799 1 0 3 0x100080 kqread resolvd 16526 6859 88095 77 3 0x100092 kqread dhcpleased 10901 174968 88095 77 3 0x100092 kqread dhcpleased 88095 202398 1 0 3 0x80 kqread dhcpleased 81868 479226 0 0 3 0x14200 bored smr 80692 138056 0 0 2 0x14200 zerothread 37149 11868 0 0 3 0x14200 aiodoned aiodoned 69233 202707 0 0 3 0x14200 syncer update 81259 151872 0 0 3 0x14200 cleaner cleaner 22100 292760 0 0 3 0x14200 reaper reaper 16631 72287 0 0 3 0x14200 pgdaemon pagedaemon 58200 225853 0 0 3 0x14200 bored viomb 92223 44121 0 0 3 0x40014200 acpi0 acpi0 19976 222750 0 0 3 0x40014200 idle1 68294 102650 0 0 3 0x14200 bored softnet 70763 490574 0 0 3 0x14200 bored softnet 11713 238958 0 0 3 0x14200 bored softnet 22082 420772 0 0 3 0x14200 bored softnet 53739 283135 0 0 3 0x14200 bored systqmp 47939 487991 0 0 3 0x14200 bored systq 54199 200806 0 0 3 0x40014200 bored softclock 80346 182754 0 0 3 0x40014200 idle0 1 398195 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76792 (syz-executor.1) thread 0xffff800021315cf0 (416080) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a18488) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:508 #2 sys_ioctl+0x4a2 #3 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 91674 (syz-executor.3) thread 0xffff8000fffee2a8 (186120) exclusive rrwlock inode r = 0 (0xfffffd807ae925e8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 #11 namei+0x36a sys/kern/vfs_lookup.c:244 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ae92808) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 70034 (syz-executor.5) thread 0xffff8000212a8a88 (478731) exclusive rrwlock inode r = 0 (0xfffffd807ae926f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 #11 namei+0x36a sys/kern/vfs_lookup.c:244 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c68ff80) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 6565K 6751K 78643K 13514 0 pcb 13 11K 12K 78643K 303 0 rtable 258 14K 16K 78643K 805 0 ifaddr 115 22K 22K 78643K 372 0 sysctl 2 0K 0K 78643K 2 0 counters 62 36K 36K 78643K 152 0 ioctlops 1 1K 6K 78643K 2522 0 iov 0 0K 16K 78643K 187 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1341 84K 84K 78643K 2235 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 20 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 227 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 81K 78643K 1816 0 sigio 0 0K 0K 78643K 92 0 proc 69 91K 115K 78643K 772 0 subproc 104 6K 6K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 24 0 in_multi 99 6K 7K 78643K 219 0 ether_multi 1 0K 0K 78643K 11 0 mrt 0 0K 0K 78643K 16 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 973 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 296 124K 124K 78643K 12478 0 UVM aobj 28 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 57 0 NDP 16 0K 1K 78643K 88 0 temp 145 4726K 5751K 78643K 17262 0 kqueue 12 18K 22K 78643K 134 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 146 0 143 2 1 1 2 0 8 0 rtentry 112 224 0 118 4 0 4 4 0 8 0 unpcb 144 791 0 776 14 13 1 6 0 8 0 syncache 296 14 0 14 4 4 0 1 0 8 0 tcpqe 32 115 0 115 3 3 0 1 0 8 0 tcpcb 768 345 0 340 19 17 2 11 0 8 1 arp 120 36 0 18 1 0 1 1 0 8 0 inpcb 368 1491 0 1483 30 28 2 16 0 8 1 nd6 48 48 0 23 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 2 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 34 0 32 4 3 1 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 7 0 7 1 0 1 1 0 482 1 pffrnode 88 7 0 7 1 0 1 1 0 8 1 pffrent 40 17 0 17 1 0 1 1 0 8 1 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 56 0 48 2 1 1 2 0 8 0 pfanchor 1280 238 0 32 18 0 18 18 0 8 0 pftag 88 8 0 8 3 2 1 1 0 8 1 pfstitem 24 21 0 19 1 0 1 1 0 8 0 pfstkey 120 27 0 25 1 0 1 1 0 8 0 pfstate 336 24 0 22 2 1 1 2 0 8 0 pfrule 1360 580 0 540 5 1 4 4 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 992 0 519 35 5 30 30 0 8 0 art_table 32 993 0 519 4 0 4 4 0 8 0 art_node 16 223 0 130 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semapl 112 224 0 214 1 0 1 1 0 8 0 shmpl 112 25 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3740 0 2288 91 0 91 91 0 8 0 ffsino 272 3740 0 2288 97 0 97 97 0 8 0 nchpl 144 6165 0 4517 63 0 63 63 0 8 0 uvmvnodes 80 4399 0 0 90 0 90 90 0 8 0 vnodes 216 4399 0 0 245 0 245 245 0 8 0 namei 1024 24257 0 24257 2 1 1 2 0 8 1 percpumem 16 88 0 45 1 0 1 1 0 8 0 vcpupl 2048 6 0 0 1 0 1 1 0 8 0 vmpool 568 10 0 4 2 1 1 1 0 8 0 pfiaddrpl 120 21 0 12 1 0 1 1 0 8 0 kstatmem 264 112 0 80 5 2 3 3 0 8 0 scxspl 216 16900 0 16898 9 8 1 8 0 8 0 plimitpl 152 483 0 468 1 0 1 1 0 8 0 sigapl 424 2137 0 2069 9 1 8 8 0 8 0 futexpl 64 15167 0 15164 1 0 1 1 0 8 0 knotepl 120 400 0 0 11 0 11 11 0 8 0 kqueuepl 216 275 0 264 3 2 1 3 0 8 0 pipepl 320 433 0 405 13 10 3 8 0 8 0 fdescpl 496 2098 0 2070 5 1 4 5 0 8 0 filepl 152 14536 0 14288 39 24 15 20 0 8 5 lockfpl 104 571 0 569 3 2 1 2 0 8 0 lockfspl 48 164 0 162 1 0 1 1 0 8 0 sessionpl 144 32 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 1620 0 1606 1 0 1 1 0 8 0 zombiepl 144 2070 0 2069 1 0 1 1 0 8 0 processpl 1064 2137 0 2069 5 0 5 5 0 8 0 procpl 672 5455 0 5367 11 2 9 9 0 8 0 srpgc 96 12 0 12 2 2 0 1 0 8 0 sosppl 168 5 0 5 1 1 0 1 0 8 0 sockpl 488 2446 0 2420 64 58 6 24 0 8 2 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 19 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 475 0 0 60 0 60 60 0 8 0 mtagpl 96 150 0 0 4 0 4 4 0 8 0 mbufpl 256 527 0 0 33 0 33 33 0 8 0 bufpl 288 5944 0 144 415 0 415 415 0 8 0 anonpl 24 400303 0 380977 159 20 139 139 0 186 12 amapchunkpl 152 35315 0 34545 60 27 33 54 0 158 0 amappl16 200 5647 0 5010 59 16 43 43 0 8 6 amappl15 192 207 0 198 1 0 1 1 0 8 0 amappl14 184 295 0 288 1 0 1 1 0 8 0 amappl13 176 326 0 324 1 0 1 1 0 8 0 amappl12 168 265 0 264 1 0 1 1 0 8 0 amappl11 160 648 0 626 2 0 2 2 0 8 0 amappl10 152 140 0 137 1 0 1 1 0 8 0 amappl9 144 628 0 622 1 0 1 1 0 8 0 amappl8 136 839 0 759 3 0 3 3 0 8 0 amappl7 128 241 0 220 1 0 1 1 0 8 0 amappl6 120 370 0 356 2 1 1 2 0 8 0 amappl5 112 1324 0 1308 1 0 1 1 0 8 0 amappl4 104 1852 0 1820 2 1 1 2 0 8 0 amappl3 96 5869 0 5819 2 0 2 2 0 8 0 amappl2 88 1023 0 985 2 0 2 2 0 8 0 amappl1 80 53525 0 52870 21 5 16 20 0 8 0 amappl 88 11836 0 11654 6 1 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 27 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2109 0 2075 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2109 0 2075 1 0 1 1 0 8 0 vmmpekpl 168 21595 0 21530 4 0 4 4 0 8 0 vmmpepl 168 208656 0 206021 169 35 134 140 0 357 6 vmsppl 368 2108 0 2075 5 1 4 4 0 8 0 rwobjpl 56 56439 0 50324 90 2 88 88 0 8 0 pdppl 4096 4225 0 4156 182 107 75 77 0 8 6 pvpl 32 872322 0 850159 295 78 217 258 0 265 31 pmappl 248 2108 0 2075 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 979 0 149 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82966ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a18280) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a18280) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002803a6c0,ffff80000067c180) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a18280) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a18280) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff80002803a820,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f end of kernel end trace frame: 0x7f7ffffd3240, count: -10 ddb{0}> machine ddbcpu 1 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> trace rc4_keysetup(ffff80002e51330a,ffff80002e51341c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e5132d0,ffffd7aa,205,ffff800000c7766c,ffffd7aa) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e54b3d8,ffff800000c77400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e54b3d8,ffff800000c77400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000c77400,1,ffff800021315cf0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1316 [inline] pppacioctl(4086334,82907003,ffff800000c77400,1,ffff800021315cf0) at pppacioctl+0x156 sys/net/if_pppx.c:1166 VOP_IOCTL(fffffd807af617e8,82907003,ffff800000c77400,1,fffffd807f7d7410,ffff800021315cf0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8077b97568,82907003,ffff800000c77400,ffff800021315cf0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021315cf0,ffff80002e54b728,ffff80002e54b770) at sys_ioctl+0x4a2 syscall(ffff80002e54b7f0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e54b7f0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fff580c650, count: -9